A Stochastic Perturbative Approach to Design a Defect-Aware Thresholder in the Sense Amplifier of Crossbar Memories

The use of nanowire crossbars to build devices with large storage capabilities is a very promising architectural paradigm for forthcoming nanoscale memory devices. However, this new type of memory devices raises questions regarding how to test their correct operation. In particular, the variability affecting the decoder is expected to make very complex the test of these new devices. In this paper we present a method to simplify the test of these new devices by using a current thresholder to detect badly addressed nanowires. In the proposed method, the thresholder design is based on a stochastic and perturbative model of the current through the nanowires. Thus, the calculated thresholder parameters are robust against technology variation. As our experimental results indicate, the thresholder error probability is initially only ∼ 10−4, which can be also reduced further (up to ~60×) by trading-off only ~35% area overhead in the memory.

Published in:
14th IEEE/ACM Asia and South Pacific Design Automation Conference (ASP-DAC), 1, 835-840
Presented at:
14th IEEE/ACM Asia and South Pacific Design Automation Conference (ASP-DAC), Yokohama, Japan, January 19-22, 2009
New York, ACM/IEEE Press

 Record created 2008-11-17, last modified 2019-03-16

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